Alloy



Patented June 27, 1933 1 UNITED STATES PATENT OFFICE HERBERT C. JENNISON, OF BBIDGIEIPORT, CON NECTICU'I, ASSIGNOB TO THE AMERIEAN BRASS COMPANY,-OF WATERBUBY, CONNECTICUT, CORPORATION OF CONNECT- ALLOY 55o Drawing.

This invention relates to a copper base alloy, particularly to an alloy which has good electrical conductivity, high strength and hardness.

I have found that by adding cadmium in amount from approximately 0.01% to 2% to a copper base alloy containing approximately from 0.01% to 3.5% silicon, 1.0% to I zinc, 0.01% to 3.5% manganese and balaluminum tends to decrease the electrical conductivity, if the alloy is to be used for electrical purposes the amount of aluminum added would not ordinarily go over 0.5%, but for some of the mechanical uses it might go as high as 6%.

g The preferred composition comprises approximately the following: silicon 0.70%, zinc 8%, manganese 0.15%, cadmium 0.5%,

, and balance copper.

This improved alloy has high tensile strength which is increased when hard drawn into Wire. and it also has hardness, toughness and high electrical conductivity. As it has improved hot working qualities it can be readily hot rolled, and it draws easily onwire machines as it can be drawn without seriously damaging the dies, which is a serious objection of the usual alloys having high tensile strength and electrical conductivity as they tear out the dies very rapidly. As this alloy has high strength and conductivity it is very good for cables or stranded conductors.

This alloy is also adapted for numerous other uses. For example, it is adapted for Application filed November 3, 1932. Serial No. 641,041.

use in making cold headed bolts, or hot headedbolts, U-bolts, or saddles, together with washers and nuts for the same. It is also good for making metal wool by the cutting process, or by drawing into fine wire, rolling into tinsel, etc.

This alloy is and for use as welding rods. It may be autogenously welded, Spot welded as well as being used as a welding rod in all types of welding. It may also be brazed.

Due to its improved hot working qualities it may be readily extruded, hot forged and hot pressed.

In addition to the hot working it may be made into wire, rods, tubes, sheets and shapes, and may also be drawn or stamped, and spun into cups and other forms of drawn metal articles.

Also on account of its high electrical conductivity and hardness it may be used for electrodes in spot welding machines.

Having thus set forth the nature of my inyention, what I claim is:

1. A copper base alloy comprising approximately 1.0% to 15% zinc,0.10% to 3.5% silicon, 0.10% to 3.5% manganese, 0.10% to 2.0% cadmium. and balance copper.

2. A copper base alloy comprising approximately 8.0% zinc, 0.70% silicon, 0.15% manganese, 0.5% cadmium, and balance copper.

3. A cold drawn wire composed of a cop per base alloy comprising approximately 1.0% to 15% zinc, 0.10% to 3.5% silicon.

further suitable for welding I 0.10% to 3.5% manganese, 0.10% to 2.0%

cadmium. and balance copper.

4. A cold drawn wire composed of a copper base alloy comprising approximately 8.0% zinc, 0.70% silicon, 0.15% manganese, 0.5% cadmium. and balance copper.

In testimony whereof Iafiix my signature.

HERBERT C. JENN'ISON. 

